Carbon scraper



May 15, 1934.

w. BARBER 1,958,604

CARBON SGRAPER Filed April 10, 1928 III/IQ anoeutoz William Barber.

Patented May 15, 1934 UNETEE STATES r .osice 3 Claims.

This invention relates to improvements in carbon scrapers, more particularly, it relates to de vices of that character for removing carbon deposits from internal combustion engines, or any part of an engine where carbon may be deposited.

It is the principal object of this invention to provide a device of the above stated character, which can be easily applied and operated and by which all carbon deposits can be quickly, and

' thoroughly, removed from any and all parts of an engine, such as connecting ports, etc.

A further object of the invention is to provide a carbon removing device comprising -a rotatable body portion wherein a plurality of scraping blades are mounted for radial movement which will clean the carbon from motor parts as the device is rotated.

A still further object of the invention resides in the detailed construction of the body portion, the character of the blades used and the manner in which they are mounted.

In accomplishing these and other objects of this invention, I have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawing, wherein- Figure 1 is a side elevation of a carbon scraping device.

Figure 2 is a view taken on line 22 of Fig. 1 and is a top plan of the body portion and blades with the shank cut away.

Figure 3 is a top plan View of the top end of the shank.

Figure 4 shows a side elevation of the lower part of a modified form of the carbon scraper.

Figure 5 is a plan view of Figure 4 with a portion shown in section.

Figure 6 is another modification of the scraper.

Figure '7 is a top plan of Figure 6.

Figure 8 is a modification of Figure '7.

Figure 9 is another modification of my carbon scraper.

Figure 10 is a sectional view of Figure 9 taken on line 1010.

Figure 11 is a longitudinal section through a portion of a modified form of carbon scraper, parts broken away.

Figure 12 is a part side elevation of Figure 11.

Figure 13 is a top plan of the scraper portion of this last form.

Fig. 14 is a detail view partly in section and with parts broken away showing the manner of attaching the scraper shown in Fig. 11 to its shank.

The carbon removing device as shown in Figure 1 comprises a shank 12, scraping member 13 having upturned scraping blades 14 and downturned blades 15. The upper end of the shank portion is provided with a co-nfigurated offset 16 which may, for example, be triangular in form to engage the triangular aperture 1'7 oi the scraping devices shown in Figs. '7, 8 and 9, when it is preferred to use one of these instead of the design shown on the lower end of Fig. 1. The shank is further provided with a threaded portion 18 onto which may be screwed an extension rod in cases where the shank is not long enough to accomplish the desired purpose. When the scraping device is placed on shoulder 16 a nut is screwed on thread portion 18 for securing it in place. In Fig. 4 there is shown a modified form of scraper blade having four portions, two of which, 14', are upturned while the other two, 15, are downturned at desired angles with respect to the body of the blade. Each of the downturned portions is alternately disposed as shown between the upturned portions.

The body portion 13, of the scraper shown in Figs. 1 and 2, is provided with a slot, or elongated aperture 13' through which the shoulder portion 19 of the shank 12 extends. This shoulder being somewhat longer than the combined thickness of the scraping plates, in this case two in number, allows them to oscillate freely when rotated and upon meeting obstructions. The device having upturned and downturned blades, goes to all parts of a cylinder including the connecting ports. The scraper blades 1% and 15 may be turned approximately 90 to the body portion as shown in Figs. 1 and 2. Figures 67 show a modified form of scraper which is hexagonal in plan and having three upturned scraping blades 20 and three downturned blades 21, all formed of a single piece of material, and provided with a central triangular aperture 1'7 for engaging the like shoulder portion, 16, of the operating shank.

In Figure 8, is shown a scraper 22, somewhat similar to that shown in Figures 6-7, having three upturned blades 23, and three downturned blades 24, but being circular in plan meets a special need not found in the other forms.

The structure shown in Figure 9 is somewhat similar to that shown in Figure 8 but is formed of three separated pieces of material 25, 26, 27 and each member has one upturned blade as at 28, 29, and 30, and one downturned blade as at 31, 32, and 33.

In Figures 11, 12, 13 and 14 I have shown a modification of the entire scraping device in which the shank portion 12' can be formed of a single piece of sheet metal, and having a cylindrical portion 34 having therein a coil spring 35 the upper end of which rests against shoulder 36 of cylinder 34, and the lower end 37 of which rests against piston 38. Piston 38 is carried by rod 39, the lower end of which is shouldered as shown at 40, Figure 13, to receive scraping member 41. Scraper 41 consists of a circular convex device having a concave apertured central portion 42 which forms a recess for nut 43 of rod member 39. Member 41 has a multiplicity of perforations punched from the inner side which produces sharp, minute, protrusions 45 on the outer side 46, thereby rendering it highly efiicient as a carbon scraping device. It is, of course, obvious that rod 39 must in this embodiment rotate with.

shank 12'. This may be provided for by any usual expedient such as that shown, to wit, having triangular, rectangular or squarerod 39- secured in a triangular, rectangular or square hole in the end of rounded portion 34 of shank 12.

, claim and desire to secure by Letters Patent is:--

1. A carbon removing device comprising a shank having a seat at one end thereof, a plurality of scraper elements loosely secured on said seat, said scraper elements having body portions mutually slidable in parallel planes at right angles to the shank, and scraper portions at an angle with respect to said body portions.

2. A carbon removing device comprising a shank having a seat at one end thereof, a plurality of scraper elements loosely secured on said seat, said scraper elements having body portions mutually sli'dable in parallel planes at right angles to the shank, and integral scraper projections angularly bent substantially vertically from said body portions.

3. A. carbon removing device comprising a shank having a seat at one end thereof, a plurality of, scraper elements loosely secured on said seat for rotation with said shank, said scraper elements having body portions mutually slidable in parallelplanes at right. angles to the shank, and aplurality ofscraping projections angularly bent from said body portions and extending in alternately opposite directions.

WILLIAM. BARBER.

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